$2n^2-48n+288$
$\lim_{x\to3}\frac{7x+28}{x^2+x-12}$
$\int\frac{x^5+2}{\left(x^2-1\right)}dx$
$\left(5a^2b+4b^2-6ab\right)+\left(10b^2-6ab+13b^2\right)$
$x^2+20x+20$
$\int_1^3e^{-2x+3}dx$
$\lim_{x\to0}\left(1+\frac{1}{x}\right)^{\frac{x}{8}}$
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